Science : Ch 11 – The Human Eye and the Colourful World

This test is designed based on NCERT Syllabus for Class 10 Topics : The Human Eye and the Colourful World

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

At noon, the Sun looks white as:

light is least scattered

all the colours of the white light are scattered away

blue colour is scattered the most

red colour is scattered the most

2 / 15

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

Red light moves the fastest.

Blue light moves faster than green light

All the colours of the white light travel with the same speed. (d)

Yellow light moves with the mean speed as that of red and the violet light.

3 / 15

The red colour of the sun at the time of sunrise and sunset is because:

red colour is least scattered

blue colour is least scattered

red colour is most scattered

blue colour is most scattered

4 / 15

The sun appears red at sunset or sunrise. Choose the incorrect statement from the following

Light from the sun near the horizon passes through the layers of air.

Light from the sun near the horizon travels larger distance in the earth’s atmosphere before reaching our eyes. (c)

Most of the blue light and longer wavelengths are scattered away by the particles.

Most of the blue light and shorter wavelengths are scattered away by the

5 / 15

Ankit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed and several observations can be explained on the basis of this phenomenon,name the phenomeoneon

Atmospheric refraction

Atmospheric reflection

Atmospheric dispersion

none

6 / 15

Why don’t planets twinkle?

Intensity of light entering our eye is infinity

Intensity of light entering our eye is one.

Intensity of light entering our eye is zero.

Intensity of light entering our eye is two.

7 / 15

What would have been the colour of sky if the earth had no atmosphere

white

dark

pink

no color

8 / 15

Light which consists of only one colour or single wavelength is called Monochromatic

Single chromatic

Dichromatic

Monochromatic

none

9 / 15

The defect in a person can see nearby objects but not far away objects

Far-sightedness

Myopia

Astigmatism

none

10 / 15

The defect the eye cannot focus objects both horizontally and vertically at the same time

Far – sightedness

Myopia

Astigmatism

none

11 / 15

When a person can see faraway objects but not nearby objects.

Far – sightedness

Myopia

Astigmatism

None

12 / 15

Astigmatism can be corrected

convex lens

concave lenses

cyclindrical lens

bifocal lens

13 / 15

The SI unit of Power of a lens is

Hertz

Dipotre

newton

none

14 / 15

The emergent ray in a prism bend at an angle to the direction of the

incident ray

refracting ray

reflecting ray

none

15 / 15

The refractive index of glass is largest for

violet color

red color

blue color

white color

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Science : Ch 11 – The Human Eye and the Colourful World

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